2x/(x^2-5x)-10x=x-3
2/(x-5)-10x=x-3
2-10x*(x-5)=(x-3)(x-5)
2-10x^2+50x=x^2-8x+15
11x^2-58x+13=0
x^2-58x/11=-13/11
(x-58/22)^2=3364/484-13/11=2792/484
x-58/22=土√2792/22
x1=(58+√2792)/22 x2=(58-√2792)/22 .